packaging: Add backup and restore utility

Initial add of ovirt-engine-backup, a utility for backing up and
restoring an ovirt-engine environment.

Change-Id: I7f6c386a0f48ccd520978193639120999e00cf2a
Signed-off-by: Ofer Schreiber <oschreib@redhat.com>
Signed-off-by: Yedidyah Bar David <didi@redhat.com>